December 2017 - South East Water
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December 2017
MELBOURNE’S WATER SUPPLY IS SECURE
68.5%
Our water Melbourne’s water supply system1, which is made up of our
water supply reservoirs and the Victorian Desalination Project,
storages are in currently has enough water for coming years and our storages
remain above the Low (Emergency) Zone under a range of
the High modelled scenarios.
(Secure) Zone Permanent Water Use Rules are currently in place supported by
the Target 155 voluntary water efficiency program which
and we encourages Melburnians to continue using water efficiently.
encourage our The Victorian Desalination Project is supplying Melbourne with
at least 15 billion litres of desalinated water for this year and the
customers to next two years. A decision on whether any additional water
continue to use should be ordered from the Desalination Project in 2018/19 will
be made by 1 April 2018.
water wisely.
Figure 1: Our water outlook zones and corresponding actions
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1For more information on the Melbourne water supply system refer to Water for a future-thriving Melbourne.
A LOOK TO THE FUTURE
In June 2017, the metropolitan retail water corporations released their Urban Water Strategies coupled with Melbourne Water’s
A number of release of the Melbourne Water System Strategy. Each strategy is reviewed every five years, to ensure ongoing water availability
scenarios were and to establish the strategic water resource investments and actions to 2065. Each aligns with the State Government of
Victoria’s Water for Victoria plan. A joint summary of our actions is outlined in Water for a future-thriving Melbourne. Figure 2
modelled to help shows projected long term water supply and demand trends for Melbourne, noting that there will be variability in specific years.
us better In addition to each strategy, each retail water corporation has prepared Drought Preparedness Plans (incorporating the Drought
Response Plan) which set out actions to prepare for- and respond to - periods of water shortage.
understand our
long term water
availability.
Figure 2: Long term water supply and demand (Source: Water for a future-thriving Melbourne, 2017)
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MELBURNIANS CONTINUE TO BE
WATER WISE
Residential Melbourne’s water usage in 2016-17 decreased by a total of 10
billion litres compared to the previous year. Total water use (see
customers Figure 4) remains below the peak levels experienced during the
Millennium Drought (1997 – 2009) despite an increase in
remain our population. Residential water use comprised 64% of Figure 4: Melbourne’s total water use by segment
Melbourne’s total water use in 2016-17 (Figure 3).
biggest water The residential per-capita consumption for 2016/17 was 161
users. Both our litres per person per day, as detailed in Figure 5, which is a
reduction in 5 litres per person per day since the previous year,
residential and we are still working towards Target 155.
non-residential To support healthy waterways, since 2011-12 (as detailed in
Figure 6), major flows have been released to the Thomson, Yarra
customers and Tarago Rivers to replicate natural flow events to trigger
environmental processes such as fish migration and spawning.
continue to use
water wisely.
Figure 5: Melbourne’s per capita residential consumption
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Figure 3: Water use breakdown for 2016-17 Figure 6: Environmental flow releases
A WARMER AND SLIGHTY WETTER SUMMER AHEAD
The Bureau of Temperature and rainfall influence water use, especially during
summer periods for watering gardens, parks, and sportsgrounds.
Meteorology At the same time, rainfall and temperature also influence
catchment soil moisture levels and inflows to Melbourne’s
outlooks show storage reservoirs. The water corporations continually monitor
slightly above storage conditions and the Bureau of Meteorology’s seasonal
climate outlooks, which are updated twice a month.
average rainfall,
The climate outlook issued on 30 November 2017 indicated that
warmer slightly above average rainfall and warmer than average day
temperatures, time temperatures are likely for the Melbourne region this
summer.
and low storage
The Bureau of Meteorology seasonal streamflow forecast issued Figure 7: Seasonal temperature outlook for December 2017 to
inflows are more on 13 November 2017 for Melbourne’s four major storage February 2018
likely for the reservoirs indicated low inflows for the three-month period
(November 2017-January 2018).
Melbourne
region over the
next few
months.
Page 5 of 10 Figure 8: Seasonal rainfall outlook for December 2017 to
February 2018
WHAT THIS MEANS FOR MELBOURNE
Water As of 30 November 2017, the total system storage level is 68.5%, 4.1% less than the same time last year. The observed storage
level trend was consistent with an extreme dry year scenario between December 2016 and July 2017, until Melbourne’s water
restrictions are supply catchments recorded above average rainfall in August and September (see Figure 9 below). Storages are currently lower
than they were this time last year, however, as a result of the Victorian Government’s desalinated water orders for 2016-17 and
not planned for 2017-18, storage levels are 3.4% higher than they otherwise would have been.
Melbourne in While storage levels are likely to remain in the High (Secure) Zone (above 60%) at 30 November 2017, modelling suggests that
they could enter the Medium (Take Action) Zone if dry conditions occur in 2018 (see Figure 9). The modelling has taken into
the next 12 account of the potential water requirements of regional urban water corporations to be met through the water grid. We have a
number of actions (as detailed in Figure 1) in the Medium (Take Action) zone, and based on this water restrictions are unlikely
months. for Melbourne over the next 12 months.
Figure 9: Melbourne Total System
Storage Outlook (projected from
23 November 2017)
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HOW WE WILL ENHANCE WATER AVAILABILITY
We have identified a number of actions in each of our Urban Water Strategies and the Melbourne Water System Strategy as well as our collaborative actions in Water for a future-
thriving Melbourne. We have provided a summary of the key actions we are jointly and separately working on to enhance our water availability.
Permanent Water Use Rules Continue to inform the community about the ‘common sense’ rules which ensure the wise use of
water at all times.
Target 155 voluntary water Continue to deliver the Victorian Government’s Target 155 voluntary water efficiency program that
efficiency program encourages metropolitan Melbourne households to use water efficiently, aiming for 155 litres per
person per day.
Development of the Victorian Water Efficiency Strategy identifies opportunities to work together to
deliver water efficiency measures.
Water efficiency By 2020, as detailed in Water for a future-thriving Melbourne, we forecast demands of 150 litres per
person per day for residential drinking water use across Melbourne.
We are currently on track to meet these forecasts.
Priority public open space The three retail water corporations have engaged with the majority of their councils. Each is
progressively working with them to develop an aligned approach to drought preparedness for
priority open spaces.
Community Rebates Program Funding provided by Department of Environment, Land, Water and Planning for proactive audit and
retrofit programs targeting various vulnerable customer segments across Melbourne.
Integrated Water Management Actively support the Department of Environment, Land, Water and Planning in the formation and
(IWM) delivery of IWM forums and lead the development of place-based IWM plans.
Desalinated water order advice Annually review the level of water availability and provide advice to the Minister for Water on the
need for a desalinated water order.
Key achievements Released our Urban Water Strategies, Melbourne Water System Strategy and Water for a future-
thriving Melbourne which sets out our actions over the next five years to ensure our long term
water availability.
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CITY WEST WATER PROGRAMS/PROJECTS
Greening the West A preventative health initiative to link sustainable water supplies to enable healthy
communities through increased greening.
Efficiency programs Continue to work with residential and non-residential customers to deliver water efficiency
projects focussing on sector specific programs.
West Werribee aquifer storage and Construction has been completed and testing is underway for an aquifer that could store Class
recovery A recycled water.
Network efficiency Undertake active leak detection, reticulation mains renewals, pressure management,
intelligent network technologies and rapid response to bursts and leaks.
Schools Water Efficiency Program Continue to deliver education programs to our local schools and community organisations.
Key achievements Stormwater Projects: Six projects are operational which equates to approximately 100 million
litres per year.
West Werribee dual reticulation: Supply of blended Class A recycled water and potable water
commenced in December 2016.
Greening the West: Stony Creek project commenced (a transformation of a 1.5km concrete
lined drainage channel to a revitalised waterway and wetland with recreational facilities for
residents, schools and community groups).
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SOUTH EAST WATER PROGRAMS/PROJECTS
Fishermans Bend Continue to work with key stakeholders and partners, leading edge and sustainable solutions to
create a water sensitive city for 80,000 people.
Monash Employment Cluster To identify most viable and beneficial integrated water management projects to enable the
achievement of the vision for the employment precinct (with Yarra Valley Water).
Aquarevo Integrated urban and water planning to create a liveable community. Utilisation of recycled water
and rain water will achieve up to 70% water savings.
Rainwater tank risk review Undertake research to assess long term regulatory risk and solutions for rainwater tanks, with a key
focus on Fishermans Bend.
Efficiency Continue to enhance the education of customers and stakeholders harnessing our new water
education site.
Key Achievements Fishermans Bend: Integrated water servicing strategy has been developed in collaboration with City
of Melbourne, City of Port Philip, Melbourne Water, Environment Protection Authority and
Fishermans Bend Hub.
Water Efficiency Appliance Survey: Completed a survey of 1,100 customers to assess the uptake of
water efficient appliances and to gain perspective of water use behaviours. Analysis is to be
completed.
Aquarevo: Land sales commenced in November 2016 and the first residents will move into their
homes through 2018-19.
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YARRA VALLEY WATER PROGRAMS/PROJECTS
Dual pipe recycled water projects – Ongoing provision of recycled water to over 100,000 properties in the northern growth
Northern growth Corridor corridor (Epping, Craigieburn West, Kalkallo, Wallan) as development proceeds.
Dual pipe recycled water projects – Planning provision of recycled water to approximately 6,000 new lots in Doncaster Hill,
Doncaster Hill predominantly high rise developments.
Network efficiency Undertake active leak detection, district metering and reticulation mains renewals.
Water efficiency Sensible water use engagement strategy for our customers to encourage water saving
while enjoying the benefits of water and targeting children and gardeners
Schools Water Efficiency Program Continuation of program in schools with identification of leaks, faulty appliances and
inefficient practices – since 2012, SWEP has saved participating Victorian schools more
than 4 billion litres of water equating to a saving of more than $11 million.
Key Achievements Recycled water services in Northern growth corridor: continued roll-out including to
suburbs of Beveridge, Craigieburn, Epping, Kalkallo, Mickleham and Wallan
Water recycling planning at Monash (with South East Water) and Latrobe National
Employment Clusters: working with Department of Environment, Land, Water and
Planning, Melbourne Water and local Councils to review opportunities for water recycling
in areas of planned redevelopment
Non-revenue water reduction: continued investment to reduce leakage by 25% primarily
through private mains metering and proactive leak detection.
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